Safety-lock for revolvers



P. DONADIO.

SAFETY LOCK FOR REVOLVERS.

APPLICATION FILED MAY 3|. 1919.

f INVENTOR.

ATTORNEY.

PROSPERO DONADIO, OF BROOKLYN, NEW YORK.

SAFETY-LOCK FOR nnvonvnns.

Specification of Letters Patent. 7 Pa tnte'd Allg'. 12, 1919.

Application filed May 31,1919, Serial No. 301,062.

To all whom it may concern:

Be it known that I, Pnosrnno DoNADIo, a subject of the King of Italy, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Safety-Locks 'for Be volvers, of which the following is a specification.

The invention relates to means for bold ing the hammer against operative movement until intentionally released, and the object of the invention is to provide a simple locking device of few parts, reliable and positive in its action, and easily added to the frame and firing mechanism of the revolver in the process of manufacture, by which the hammer is held against rising until freed by pressure of the hand auto matically in grasping the butt of the revolver with the force required by the act of firing.

The invention consists in certain novel features and details of construction and ar rangement by which the above objects are attained, to be hereinafter described and claimed. 4

The accompanying drawings form a part of this specification and show the invention as it has been carried out in practice.

Figure 1 is a side view of a double action revolver, partly in vertical section and with certain portions broken away or omitted, equipped with the improved safety-lock, shown in the locked condition.

Fig. 2 is a similar view of the rear portion of the same, showing the unlocked condition, in the act of firing.

Fig. 3 is a rear view of the revolver.

Fig. 4 is a vertical section of the locking lever and its connections, partly in elevation.

Similar letters of reference indicate the same parts in all the figures.

A is the frame of the revolver, B the hammer mounted on the hammer-screw A and C the mainspring having its free end engaged in the notch 79 of the hammer and acting thereon as usual. The hammer is raised in opposition to the mainspring through the trigger D by the usual or any approved means.

In the cheeks A of the frame is a pin E serving as the fulcrum for the locking dog or lever F by which the hammer is held against rising. It has a nose F shown as presented to the rear face of the hammer .in the notch 12 adjacent the concentrically curved portion B of the hammer, and its tail lying adjacent the rear limb A of the frame A between such portion of the frame and the mainspring-C. w r

A- light helical expansion sprin F mounted in a recess f in the locking ever near its lower end, abuts against the mainspring C and exerts its force to hold the tail F of the lever against the inner face of the limb A and the nose F in the path of the portion 13 of the hammer and thus prevent the rising movement of the latter. The tail F carries a stud F projecting through the limb A of the frame, having a flat head or plate F on the protruding end, held out of contact with the rear face of the limb by the action of the spring F.

In exerting the pull required by the trigger finger in raising the hammer, the hand forces the plate F toward the limb A of V the frame, compresses the spring F and tilts the lever sufficiently to swing the nose F clear of the hammer and permits the hammer to complete its firing movement. On releasing the plate the lever is returned to the engaged position through the force of the spring F The revolver cannot be fired until the locking lever is'thus tilted, and the plate F is so located as to produce the required tilting movement automatically in the act of firing.

The lever with its pin E, spring F stud F and plate F is easily added to the re volver in the process of manufacture without change other than the production of the perforations required for the pin and stud, and consequently adds but little tothe cost of production, and is applicable to many types of revolvers, with or without slight modifications as may be found necessary in such adaptations.

It will be noted that the pressure on the plate F need be maintained only long enough to free the nose F from the hammer; in the further rising movement of the hammer the nose rides upon the concentric portion B thereof, see Fig. 2, and is inop erative until the hammer falls.

The size and shape of the plate F may be varied as found necessary or desirable.

I claim 1. The safety-lock described, comprising a lever fulcrumed in the frame of the revolver, having a nose adapted to engage the hammer and prevent the rising movement of the latter, a. spring on said lever abutting against the mainspring of the revolver and ment of the latter, a spring on said lever abutting against the n'iainspring of the rehls PROSPERO DONADIO.

mark. fitness E. WHITNEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 0! Patents,

Washington, D. G. 

